Snapper is a command-line tool developed by SUSE for managing filesystem snapshots. It allows users to create, delete, compare, and restore snapshots of their system or data. A snapshot is a read-only point-in-time copy of a filesystem, useful for recovering from system changes or errors. Snapper integrates deeply with the SUSE ecosystem and works primarily with Btrfs, though it also supports LVM with thin provisioning. It can automatically take snapshots before and after software updates or system modifications, helping users track what changed and roll back if necessary. By using pre and post snapshots, Snapper provides a simple way to undo changes or restore files without requiring full system backups. It also supports automatic cleanup routines to manage disk space efficiently. In practice, Snapper serves as both a safety net and a diagnostic tool, making it easier to maintain system stability and recover quickly from mistakes or failed updates.